E-book editor 8.5.0 — the first minute without a single click
How we tested: a clean Debian 13 in a disposable container; source — package calibre 8.5.0+ds-1+deb13u3 from the Debian repository. Run as a regular user on a virtual screen, 60 seconds, nothing clicked. 17.10.2026. Every network request and every file written was recorded; the code was not decompiled. The container was deleted afterwards.
Program website: https://calibre-ebook.com
Package SHA-256: 38a1e55fdcc5b5db0b6490694b813bdd41143d4376eab594824739e2fe91a14c
Summary
| What we checked | Result |
|---|---|
| Built-in telemetry, crash reporting, analytics, ad SDKs | none |
| Network requests in the first minute | not a single network request |
| Known trackers among the servers | none |
| Files written in the first minute | 104 |
| The program ran the whole time | yes — process alive at the end |
What is built in
5411 files (109 MB) were checked.
No code of known telemetry, crash reporting, analytics or ad SDKs was found.
Addresses of known trackers in the program’s files — addresses in code, not requests:
| Tracker | Addresses | Mentions |
|---|---|---|
google.com, www.google.com, sites.google.com, news.google.com | 151 | |
| Wikimedia | upload.wikimedia.org | 53 |
| YouTube | www.youtube.com, img.youtube.com | 10 |
| WordPress.com | i0.wp.com, i2.wp.com | 9 |
| Amazon CloudFront | d2r2ijn7njrktv.cloudfront.net, d2kfnvwohu0503.cloudfront.net, dxxd96tbpm203.cloudfront.net, d2r55xnwy6nx47.cloudfront.net | 6 |
| Facebook CDN | a5.sphotos.ak.fbcdn.net, sphotos.ak.fbcdn.net, profile.ak.fbcdn.net, a4.sphotos.ak.fbcdn.net | 4 |
| Yahoo | news.yahoo.com, rss.news.yahoo.com, video.search.yahoo.com | 4 |
| Google (изображения YouTube) | yt3.ggpht.com | 3 |
www.facebook.com | 3 | |
| Shopify | cdn.shopify.com | 2 |
| Microsoft Bing | tse3.mm.bing.net, tse4.mm.bing.net | 2 |
| Tradedoubler | clk.tradedoubler.com | 2 |
Where it connected
Not a single request: no DNS lookup, no connection.
What it wrote to disk
Folders the program wrote files to during the minute:
| Folder | Files |
|---|---|
~/.cache/mesa_shader_cache_db | 102 |
~/.config/calibre | 2 |
How to read this card
- This is the first minute after launch with no action at all: what the program does on its own. Normal use may involve more requests.
- A “built-in SDK” means the library’s code was found. It does not prove data transfer, and an address in the code is not a request.
- The review was made automatically using a single method. You can check any program yourself here.